повеќекратна употреба

a term used to describe the chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose.

концентрација

Natural environment; Water

The relative amount of a substance mixed with another substance. An example is five ppm of carbon monoxide in air or 1 mg/l of iron in water.

геолошка ерозија

Natural environment; Water

normal or natural erosion caused by geological processes acting over long geologic periods and resulting in the wearing away of mountains, the building up of floodplains, coastal ...

милиграми на литар (mg / L)

Natural environment; Water

a unit of the concentration of a constituent in water or wastewater. It represents 0.001 gram of a constituent in 1 liter of water. It is approximately equal to one part per ...

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Industrija/področje: Holiday Category: Unofficial holidays

Големиот американски Smokeout

Гледано секоја година од 1977 година, големиот американски Smokeout се одвива на третиот четврток од ноември. Спонзорирано од Американското здружение ...